iUniverse (http://www.iuniverse.com/) – This company focuses on offering a more extensive publishing package. They help the author with more things, or do more things for the author. But this also comes with a higher price.

AuthorHouse (http://www.authorhouse.com/) – This company is a direct competitor with iUniverse. If you want a lot of hand holding in your publishing, this is the sort of company you need to consider.

WOWIO (http://www.wowio.com/index.asp) – This is a place to sell ebooks, comics, and graphic novels. There is a great deal of flexibility in how you sell.